Iggy contracted the Cogito virus and grew to become enraged at Re-l's lack of regard for him. He despises Proxies and blames Vincent for taking Re-l—his sole Raison d'Être (reason of existence)—away from him.
He develops an unusual state of both loving and hating Re-l, and locks her up to "protect" her, while he attempts to kill Vincent. Re-l escapes after being attacked by an AutoReiv belonging to a Proxy she killed, and the AutoReiv pursues her. The AutoReiv goes into a self-detonation mode, and Iggy sacrifices himself to protect Re-l, leaving little more than his broken head behind (which leaves Iggy conscious to some extent). In the end, not wanting to see Iggy suffer due to the virus, Re-l shoots him and buries his head.